Compound engine.



No. 740,565. PATENTED OCT. 6, V1993. G. G. HILL.

COMPOUND ENGINE. APPLIUATIONHLBD 0032.23; 19o1.` no MODEL. v v 1 SHEETS-snm s.

#M7 www' No. 740,565. PATBNTED 00T. 6,1903.,

c; o. HILL GoMPoUND ENGINE.

` I APPLIGATION FILED 00T. 23, 1801. H0 MODEL, l 7 SHEETS-SHEET 4.

1 No. 740,565. PATBNTND 00T. 6, 1.903..

c. o', HILL.

GoMPoUND ENGINE.

APPLICATION FILED 001223, 1901.

7 SHEETS-SHEET B.

NOMGDEL.

N N Nfl PATNTED 0GT.6,190 3.

- GGMPOUND ENGINE.

APPLioATzoR FILED 00T. 2a, 1901.

7 SHEETS-SHEET 7.

'N0 MODEL.

UNITED STATES" PATENT atented October 6, 19053;

OFFICE.

CHRSTIAN C. HILL, OF CHICAGO, ILLINOIS.

coMPoUN'D ENGINE.

sPnorFIcArIoN forming part of Lentersratent No. 740,555, dated-october e, 1903.

.To tZZ- whom, t Wea/y coli/ecrit.

Be it known that I, CHRISTIAN C. HILL, a' citizen of the United States of America, and a resident of Chicago, inthe countyofwCook and State of Illinois, have invented certain ing type of such engines.

Various objects of the presentv improve- `ments are as follows: to provide a simple and efcient controlling valve mechanism with which the'series of individual engine-cylinders comprising the compound engine are adapted to be coupled together in pairs, working compound and attaining a duplex expansion of the motive fluid, or to be coupled in se-v ries to attain a quadruple expansion of such motive iiuid in case of a motive-power engine and a similar double or quadruple compres.-

sion of the fluid operated upon in a pu mping or,

compressor engine; also, to provide a sim ple and efficient constructionaud arrangementof a single-acting oscillating engine and its individual reversing-valve mechanism with which an efficient reversal of the course of the motive or other uid is attained and in which the reversing-valve is adapted to act as a relief-valve and in addition is'adapted to maintain a steam-tight joint with its seat during continued use and with a minimum amount o f friction.

Other and minor objects of the present improvements are to provide means whereby the engine is rendered simple, compact, and durable in construction andecient and economical in operation, all as will hereinafter more fully appear and be more particularly Y pointed out in the claims.

I attain such objects by the construction and arrangement of parts illustrated in the accompanying drawings, in which- Figure `l is a longitudinal sectional elevation at line x, Fig. 2, of a compound engine embodying the present invention; Fig. 2, a transverse sectional elevation of an individual engine at line afm', Fig. 1, illustrating one posifion of the engine; Fig. 3, a similar view illustrating another position of said eny gine; Fig. 4, an'enlarged detail longitudinal section at line :r2 x2, Figs. 1 and 8, illustrating the valves and connections of the present invention in position for quadruple expan sion; Fig. 5, asimilar view of the mastervalve and connections, taken at line `.003 m3, Fig. 8; Fig. 6, atransverse section of the same at line x4 004,'Figs. 5 and 8; 1|"ig, 7, a similar view at line m5 m5, Figs. 5 and 8; Figs. 8 and 9, vertical longitudinal sections at line m6 x6, Figs. 5, 6, and V7, illustrating two dilerent portions of the master-valve; Figs. 10 and 1l, detail longitudinal sections of the master-valve, similar to Figs. 4 and 5 and illustrating the said valve in position for duplex expansion; Fig. 12, a vertical longitudinal section of the same at line :1:7 11:7, Fig. 11. Fig. 13 is a longitudinal sectional eleva` tion of a modified-form of the master-valve; Figs. 14 and 15, transverse sections of the same at lines :rs m8 and co9 at, respectively.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1 represents the l main frame of the engine, having any usual and suitable form and which will preferably comprise an inclosing casing 2 anda skeleton base or structure provided with bearings for the crank-shaft 3A and the trunnions 4, 4', 4", and 4"', by which the series of engine-cylinders are supported to oscillate in the main frame.

5 5 5"' are the engine-cylinders, which in the type of compound engines shown in the accompanying drawings as illustrative of the present invention comprise a series of four cylinders havin ga progressively-increased diameterin manner usual to compound engines. Itis, however, within the province of this part of the present invention to increase or diminish the number of engine-cylinders as the particular circumstances or the judgment of the constructor may indicate. Said enginecylinders are shown as of the single-acting type vopen at the end adjacent to the crankshaft and closed at the end removed from such crank-shaft.

6 b" 6 6' are heads closing the ends of the engine-cylinders removed from the crankshaft and preferably. formed integral with their respective engine-cylinders, as shown. In'the present invention each of such closure` IOO heads will have a convex or segmental face concentric with the axis of oscillation of the engine-cylinders to constitute the oscillating member of the individual reversing-valve, by which the induction and eduction of the motive Huid to each individual engine-cylinder is controlled.

7 7, tbc., are individual centrally-arranged ducts or passages in the respective cylinderheads, which connect with the piston-chambers of the respective engine-cylinders and constitute an ind uction-eduction duct or passage for each cylinder.

8 8' 8" 8 are the non-oscillating members of the individual reversing-valves of the respective engine-cylinders, each having a concave or segmental face corresponding with the segmental face of the oscillating valve member above described and adapted to seat thereon, as illustrated more particularly in Figs. 2 and 3.-

9 9 9 9"" and 10 10' 10" 10" are counterpart independent ducts or passagesin the non-oscillating valve member constituting the induction and ed u ction passages of the same. vSuch ducts or passages are of a spiral formation and extend from the respective and opposite ends of each valve member to a pair of ports or openings in the seat or surface of such valve member. Such ports or openings are arranged parallel to each other and transverse to the direction of movement of the oscillating valve member aforesaid and are adapted to` alternately register with the single central ind notion-ed uction of the particular engine-cylinder in the oscillation of the same in use.

11 11 11" 11"l are a series of auxiliary fixed members carried in any suitable manner by the frame of the engine and provided with counterpart independent ducts or passages 12 12 12"12'and 13 13'13"13",identicalin formation and arrangement to the ducts or passages 9, dre., and 10, the., above described and which are respectively in communication in the indirect manner hereinafter described with the main motive-fluid supply and with the main motive-fluid outlet ofthe engine. The respective ends of both the aforesaid members 8 8 S 8 and 11 11 11 11" are formed with annular-seats of any usual form, preferably the cone or tapering form shown, for connection with correspondiugly-formed tubular necks 14 14 14 11" and 15 15' 15" 15" of the hollow counterpart connecting members 1G 16' 16" 1b"-l and 17 17 17 17. The said connecting members are adapted to connect the ducts or passages of the respective members 8, dac., and 11, dac., together in an independent manner and as so constructed and arranged constitute a pivotal conducting connection between a stationary member 11 and anon-oscillating valve member 8 to permit of a movement of such valve member to or from its seat upon the cylinder-head, for purposes hereinafter stated.

18 represents a series of tie-bolts connecting the pairs of members 16 and 17, the., together and tying the parts together in operative relation.

18 represents a series of elastic members inserted between the heads of the bolts 18 and the adjacent surface of the connecting members and adapted to afford a yielding tension to hold the part-s in operative engagement.

19 represents a series of elastic compression pieces or members carried by the engine-frame and having an elastic or yielding bearing upon the valve members 8 8', &c., to yieldingly hold the same to their seats upon the heads of the oscillatingengine-cylinders to permit said valve members moving away from their seats under undue pressure within such cylinders, and thus constitute a series of independentl relief or safety valves for such cylinders in cases where an extraordinary pressure prevails therein. Such provision also maintains a contact of such valve members upon their seats to compensate for wear during continued use of the engine. The said holding member 19 may be of any usual and suitable form Vand construction'adapted to attain the described results. VIn the construction illustrated in Figs. 2 and 3 of the drawings such holding mem- 'bers will each consist of a spring bar or plate attached at one end to the main engine-frame and having intermediate bearing upon the top of the particular valve member, with its other end engaged by a temper-screw and nut 19', by which the tension of such springbar is adjusted to suit any particular pressure under which the engine is designed to work.

In the present construction the respective induction and ed uction passages or ducts 12, dac., and 13, dac., of the series of auxiliary xed members 11, dac., of the individual reversing valve mechanisms will connect with a corresponding series of ducts or passages in the base or seat of the valve chestor casing 20, to be controlled by amastervalve 21, which is adapted in the manner hereinafter described to perform the dual functions of reversing the direction of the revolution of the engine and to control the direction of the motive fluid from enginecylinder to engine-cylinder, so that the engines may be run compound in pairs with a duplex expansion or in series with aquadruple expansion of the motive fiuidl In the particular type of four-cylinder compound engine shown in the drawings as illustrative of the application of the present invention to a compound engine for power purposes a series of four single-acting enginecylinders are employed, with a single mastervalve controlling the series and having alongitudinal movement upon its seat to change the engine from a quadruple to a duplex expansion arrangement, and vice versa, and a lateral movement to effect a reversal of the direction in which the engine-shaft is rotating.

ICO

` or passages, and each pair individual to the individual reversing-valve mechanisms of the first three of the series of engine-cylinders 5' 5". 24 25 are a fourth Apair of parallel ducts or passages similarly formed in the base or seat portion of the valve-chest, but differing from the other three pairs of ducts' just described in being extended longitudinally through the base of the valve-chest to individually connect with, the ducts or passages 12" and 13 of the auxiliary fixed member 11 of the individual reversing-valve mechanism of the fourth or last engine-cylinder of the series. 26 27 are secondary ports or openingsin the valve-seat, communicating with the ducts or passages 2l 25 immediately back of the forward or main ports or openings of the same for 'the purposes hereinafter described. 28 2S' and 29 29' are parallel pairs of U-shaped longitudinal passages formed in f the base or seat portion of the Valve-chest and alternating between the first three series of ducts or passages 22 22' 22 and 23 23 23 aforesaid. Said passages 28 28 29 29' havemotive iliid from a forward engine-cylinder for a given period in the cycle of the engine in which the next engine-cylinderis reaching a position to receive and utilize such motive/fluid.

The master-valve 2l Will have a hollow` trunk form, the interior of which is partitioned off into a smaller exhaust-chamber 32 and alarge main storage-chamber 33 to receive the rnotive fluid from a high-pressure engine-cylinder and store the same until a succeeding low pressure engine cylinder comes intoA proper position to receive and utilize such motive fluid.

The chamber 33 and the chamber 3l, be-

- fore described, are intended to afford sulficient capacity for storing the motive duid, as above described. When desired, however,

the chamber 3l may be enlarged by connec-V tion with a closed tank ofthe desired capacity,

arrangedin adjacent relationto the valvechest 20, as the judgment of the constructor may suggest. v

The master-valve will comprise generally a central series of outlet or eduction ducts or passages andtwo counterpart series of inlet or induction ducts or passages arranged parallel with and at opposite sides of the central series of ducts, the arrangement being such that'with a lateral shift of the master-valve in one direction one of said series of inlet-ducts will be brought into active position or communication with thenext adjacent series of ducts or openings in the valveseat, while the counterpart series of said in-' let-ducts ofthe master-valve will be simultaneously shifted to a plane portion of the valve-seat and rendered inoperative, and vice versa, in a lateral movement of'the mastervalve in the opposite direction. With such lateral movement of the master-valve in either direction the central series of outlet ducts or passages will beshifted in their communication fromone to the other of the parallel series of ports or passages 22 22' 22" 24 and 23 23' 23" 25 in the valve-seat to open to eduction the particular series of such ducts which had previous tosuch movement been in communication With the motive-fluid inlet or induction passages of the engine-cylinders. In detail the aforesaid ducts or passages in the master-valve Will comprise a for-mation and arrangement as follows: y Y

34 represents a counterpart pair of marginally-arranged ducts or passages located at the forward 'end ofthe master-valve and each formed with a longitudinal enlargement at its lower end which opens onto the valve-seat, as shown in Figs. 4 and 10. Such passages 34 are open at top and in communication with the interior of the valve-chest 20, in Which motive fluid at high pressure prevails, While at bottom one or the other of said ducts are in register with one orthe other of the pair .of parallel ducts 22 or 23 of the valve-seat,

depending upon the lateral position of the master-valve, to supply motive fluid to the irst of the series of' engines in a constant manner regardless of the longitudinal posi.

tion of said valve.

In the duplex-expansion position of the master-valve, as illustrated in Figs. 10, l1, and 12, one or the other of the said ducts 34 is adapted to additionally register with and supply high-pressure motive duid in common to thev IOO IIO

Valve, as illustrated in Figs. l'l'and l12, the said duct or passage 35 is adapted to register the particular duct 22 or 23 through which passes the eduction from the first of the series of engine-cylinders with the receiving or storage chambers 33 of the master-valve, as hereinafter more fully explained in the operation of the invention.

36 36' 36 are a series of branched or V- shaped ducts or passagesin the master-Valve, the central point of intersection of the branches terminating in centrally-arranged I ports or openings 37 37 37, which are adapted in either of the lateral positions of the master-valve and in the quadruple-expansion position of the same, asillustrated in Figs. 5, 8, and 9, to register with one or the other of the series of ducts 22 22' 22 or 23 23 23 of the Valve-seat and in connection with the same constitute a part of the eduction or exhaust passages for the first three of the series of engine-cylinders when the same are running on quadruple expansion. The respective branches of said passages 36 36 36 terminate in ports or openings 38 38 38 in longitudinal alinement with the induction ductsv or passages 34 aforesaid and adapted in the above mentioned position of` the mastervalve and as illustrated in Figs. 4, 8, and 9 to register with one or the otherof the series of longitudinal ducts or passages 28 28 or 29 29 in the valve-seat to conduct the motive fluid from a forward engine-cylinder to the next adjacent engine-cylinder in an operation under quadruple expansion. Said series of branched passages or ducts 36 36 36 37 37 37" 38 38 38"in the duplex-expansion position of the master-valve, as illustrated in Figs. 10, 1l, and 12, assume a dormant or inactive condition.

39 represents a counterpart pair of openbottomed chambers or passages in the master-valve arranged in longitudinal alinement with the ducts 34 aforesaid and in immediate relation to the ducts or passages 22 23,Which connect With the second engine-cylinder of the series. In the quadruple-expansion position of the master-valve, as illustrated in Figs. 4, 8, and 9, one or the other of said passages 39 is adapted to register the ducts 28 22 or 29 23' together to conduct motive'fluid passing away from the first engine-cylinder into the second engine-cylinder for secondary expansion therein, While in the duplexexpansion position of the master-valve, as illustrated in Figs. lO and 12, one or the other of said passages 39 is adapted to register a high-pressure inlet-duct 34 and intermediate passage 28 or 29 With one or the other of the passages 22 or 23 to introduce highpressure motive fluid into the second engine-cylinder of theseries.

40 represents a counterpart pair of ports or openings in the bottom of the master-valve, arranged in longitudinal alinement with the ducts 34 and 39 aforesaid and in immediate relation to the ducts or passages 22H 23,

' means for rocking said shaft.

which connect with the third engine-cylinder of the series. In the quadruple-expansion position of the master-Valve, as illustrated in Figs. 4, 8, and 9, one or the other of said ports .4G-is adapted to register the ducts 28 22" or 29/ 23 together through the main storagechamber 33 of the master-valve to conduct motive fluid passing away from the second engine-cylinderinto the third engine-cylinder for tertiary expansion therein, While in the duplex-expansion position of the master- Valve, as illustrated in Fig. ,10, such ports 40 do not register With the passages 28 or 29', and accordingly such last-mentioned passages remain dormant or inactive.

In the construction shown in the drawings movements of the master-valve in longitudinal and lateral planes are attained by mechanism as follows: 4l is a shaft extending longitudinally through the valve-chest 2O of the master-valve and adapted to have endwise or longitudinal movement as Well as a rocking movement therein. 42 is a crankarm or other usual and equivalent means secured to said shaft outside the valve-chest to afford 43 is a bellcrank lever or other usual and equivalent means fulcrumed on a stationary portion of the engine, with one of its arms in operative engagement with the shaft 41, to afford means for imparting a longitudinal or endwise movement to said shaft. 44 represents a pair of toothed sectors secured to the shaft 41 within the valve-chest. 45 represents a pair of trans- Versely-arral'iged toothed racks secured to the master-valve and having operative engagement with the toothed sectors 44, so that with a rocking movement of the shaft 41 in either direction a lateral movement of the master- Valve will be effected in a corresponding direction. 46 represents bracket-lugs secured to the top of the master-valve and adapted to abut against the opposed faces of the hubs of the toothed sectors 44 to hold the valve against any independent longitudinal movement with relation to the said toothed sectors and the shaft 41, so that with a longitudinal movement of the shaft in either direction a correspondinglongitudinal adjustment of the master-valve will be effected. 47 47', dac., are the pistons of the respective engine-cylinders, which in the construction shown have an annular form and are provided With closureheads at the ends next adjacent the induction-eduction ducts of the engine-cylinders. 48 represents lugs or projections upon the closure-heads ofthe pistons, adapted to enter the induction-@duction ducts 6 6', &c., of the engine-cylinders to effectually displace the motive or other fluid in the back or return strokes of the pistons, and Which feature is of especial value Where the present invention is employed as a pumping or compressing engine for elastic fluids or gases. 49 49', dac., are the pitman-rods, formed integrally with the pistons and having connection with the annular walls of the pistons by the IIO integral spiders or arms 50 and with the closure-heads of the pistons by longitudinal extensions, as illustrated in Fig. 1. 51 represents journal-boxes, of any usual construction, carried on the free ends of the pitmanrods 49 and adapted to have operative engagement with the series of crank-arms of the engine-shaft.

In the modified form of the master-valve (illustrated in Figs. 13, 14, and 15) the same arrangement of ducts or passages heretofore described will be maintained, the modification consisting mainly in making such mastervalve of a cylindrical form,.so that it will have an oscillating movement upon its seat instead of the rectangular lateral movement heretofore described.

Various portions of the present improvements are adapted for effective and economical employment in an engine for pumping or compressing elastic fluids and gases, and it is accordingly within the scope or province of the present invention to so apply the differentv novel features of the present invention.

The operation of the present invention as a motive-power engine will be as follows: With the master-valve 21 in the quadrupleexpansion position illustrated in Figs. 2, 3, 4, 5, 6, 7, and 8 of the drawings and with high-pressure motive fluid existing in the interior of the valve-chest 20 of the mastervalve the motive fluid will pass from said valve-chest through the marginal duct 34, which is in register with the duct 22, and successively through said duct 22, the duct 12, the passage of the hollow connecting member 16, the duct 9, and the duct 7 into the piston-chamber of the first of the series of engine-cylinders to impart movement'to the piston thereof and to the crank-shaft of the engine. As the piston of such engine-cylinder nears the end of its active stroke the individual valve mechanism of such cylinder automatically reverses the position ofits ducts 9 and 10, cutting off the communication of the pressure-supply duct 9 .with the interior of such engine-cylinder and bringing the ed notion-duct 10 into communication therewith. The motive fluid in the first engine-cylinder is now free to expand through the ducts 10, 13, 22, 36, 28, 39, 22', 12', and 9 into the second engine-cylinder to effect an active movement ofthe piston thereof. As

' such piston nears the end of its active stroke the individual valve mechanism of such second engine-cylinder automatically reverses the position of its induction and eduction ducts 9 and 10', cutting off the before-described communication with the first enginecylinder through the duct 9' and its connections and bringing the eduction-duct 108 into communication with the interior of the second engine-cylinder, the motive fluid in which ceiving position is due to the quai-tering position 0f its crank-arm, as well `as the crank-arm of the fourth engine-cylinder, with relation to the crank-arms of the first and second engine-cylinders. Accordingly some means is required for storing the motivefluid during the described interval, and such means is very efficiently provided in the present construction by the receivingchamber 33 in the master-valve and the secondary receiving-chamber 3l in the base of the valve-casing, die., as heretofore set forth in the descriptive portion of the specication. With the third engine-cylinder at its receiving position the motive fluid previously stored in the receiving-chamber of the master-valve passes through the ducts 22", 12",.

9", and 7" into the piston-chamber of such cylinder to effect an active movement of the piston thereof. As such piston nears the end of its active movement the individual valve mechanism of such third engine-cylinder automatically reverses the position of its induction and eduction ducts 9 andl 10", out- 'ting od the before-described communication through duct 9 and its connecting-passages with the chamber 33 of the master-valve and bringing Vthe eduction-duct 10" into communication with the interior of said third enginecylinder,tl1e motive-fluid of which is now free t0 expand through said duct 10". and the connecting-ducts 13", 23", 36", 24, 12', and 9"' into the fourth engine-cylinder to eect an active movement of the piston thereof. As such piston nears the end of its active movement the individual valve mechanism of such fourth engine-cylinder automatically IOO IIS

l2 of the drawings and with high-pressure motive fluid existing in the interior ofA the valve-chest 20 of the master-valve the motive fluid will pass from said valve-chest into the marginal duct 34, which isvin direct register with the` duct 23 and in indirect registerfwith the duet 23', through ducts or passages 28 39 'to supply high-pressure motive fluid in common to the first and second engine-cylinders 5 and 5',through the ducts 12 12', the passages ofthe hollow connecting members 16 16', the

ducts 9 9 and 7 7 into the piston-chambers of said engine-cylinders to impart active movement to the pistons thereof, and to the engine-shaft through the intermediate connections between said pistons and the engineshaft. As such pistonsnearthe end of their active strokes the individual valve mechanisms of the aforesaid first and second enginecylinders automatically reverse the positions of the ducts 9 l0 and 9 10', cutting o the communication of the pressure-supply ducts 9 9 with the interior of said cylinders and bringing the eduction-ducts lO 10' into communication therewith. As such positions of the described parts are reached in a cycle of the engine the motive fluid in each respective engine-cylinder is free to expand th rough the respective ducts 10 l0 and the connecting-passages 22 22 into the storage-chamber 33 of the master-valve and into the secondary storage'- chamber 3l when the same is employed,asheretofore described. From such storage or receiving chamber of the mastervalve the motive fluid passes to the third and fourth engine-cylinders 5 when the same reach their receiving position in a cycle of the engine, the motive lfluid passing to the third engine-cylinder through the ducts or passages 40, 23, l2, 9, and 7" and to the fourth enginecylinder through the ducts or passages 24, 12', 9', and 7". As the pistons of the respective cylinders 5" and 5' near the end of theiractive stroke theindividual valve mechanisms of said engine cylinders automatically reverse the positions of the ducts 9 9 and 10"10, cutting 0H the communication of the pressure-supply ducts 9 and 9 with the interior of said engine-cylinders and bringing the ed notion-ducts 10"and 10" into communication therewith, the motive iiuid in which is free to exhaust in the case of the third engine-cylinder 5" through the passages or ducts lO" 13" 22l into the exhaust-chamber 32 of the master-valve and in the case of .the fourth engine-cylinder 5" through the passages or ducts 10', 13, 24, and 27 into the exhaust-chamber 32 ofthe master-valve. From such exhaust-chamber 32 the motive fluid passes to the atmosphere or to a condenser through the exhaust-outlet passage 3() of the valve-chest of the master-valve.

Having thus fully described my said invention, what I claim as new, and desire to secu re by Letters Patent, is-

1. In a compound engine, the combination of a series of engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-Valve, and means for adjusting the position of the master-valve, substantially as set forth.

2. In a compound engine, the combination .of a series of engine-cylinders, individual means for reversing the induction and eduction of the same, a longitudinally-sliding master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-Valve, and means imparting longitudinal adjustment tothe master-valve, substantially as set forth.

3. In a compound engine, the combination of a series of engine cylinders, individual valves forreversing the induction and eduction of the same, a master-valve controlling the induction and eduction ducts of said reversing means and adapted -to couple the same for duplex or 'serial action, a valve-chest inclosing the master-valve, and means for adjusting the position of the master-valve, substantially as set forth.

4. In a compound engine, the combination of a series of engine-cylinders, individual valves for reversing the induction and eduction of the same, alongitudinally-sliding master-valve controlling the induction and eduction duets of said reversing means and adapted to couple the same for duplexor serial action, a valve-chest inclosing the master-valve, and means for im partinglongitudinal adjustment to the master-valve, substantially as set forth.

5. In a compound engine,'tl1e combination of a series of engine cylinders, individual means for reversing the induction and eduction of the same,a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by thelateral adjustmentof the master-valve, a valve-chest inclosing the master-valve, and means for imparting lateral adjustment to said valve, substantially as set forth.

6. In a compound engine, the combination of a series of enginecylinders, individual means for reversing the induction and eduction ofthe same, a master-valve having acentral longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adj ustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting lateral adjustment to said valve, the same comprising a shaft journaled in the valve-chest and operative connections between the same and tbe mastervalve, substantially as set forth.

7. In a compound engine, the combination of a series of engine cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the master-valve and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting independent lateral and longitudinal movements to said valve, substantially as set forth.-

8. In a compound engine, the combination dinal movements to said Valve, the same comprising a shaft capable ot longitudinal and rotative movements and operative connections betweeen the same and the valve, substantially as set forth.

9. In a compound engine, the'combiuation of a series of enginecylinders, individual means for reversingl the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the master-valve, and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosingthe master-valve, and means for.

imparting independentlateral and longitudinal movements to said valve, the same comprising a. shaft capable of longitudinal and rotative movements, toothed sectors carried by said shaft, toothed racks secured to the valve and meshing with said sectors and abutment-pieces on the valve adapted to prevent independent longitudinal movement of said shaft, substantially as set forth.

l0. In a compound engine, the combination of a series of engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and twoy 'deflected laterally to meet at the middle of the master-valve and adapted to be altermately brought into action bythe lateral adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting lateral adjustment to said mastervalve, the saine comprising a shaft journaled in the valve-cliestand operative connections between the same and the master-valve, substantially as set forth.-

l2. In a compound engine, the combination of a series of engine cylinders, individual means for reversing'the induction and eduction of the same, a master-valve having a central longitudinal series ot' ducts and two series of marginal longitudinal ducts which are deflected laterally to meet at the middle of the master-valve and adapted to be alternately brought into action by the lateral adjustment of the master-valve, and to couple the induction and eduction ducts of the individual reversing means for duplex or Serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting independent lateral and longitudinal movements to said valve, substantially as set forth.

13.v In a compound engine, the combination of a series of engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are detlected laterally to meet at the middle of the master-valve and adapted to be alternately brought into action by the lateral adjustment of the master-valve, and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting independent lateral and longitudinal movements tosaid valve, the same comprising a shaft capable of longitudinal and rotative movements andl operative connections between the same and the valve, substantially as set forth.

14. In a compound engine, the combination ot' a series of engine-cylinders, individual means for reversing the induction and eduction of the same, a longitudinally-sliding master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or Vserial'ac'- tion, a valve-chestinclosing the master-valve, a storage-chamber, controlled by the mastervalve and adapted to receive the motive Huid from a forward engine-cylinder and store the same for reuse in a rearward engine-cylinder, and means for imparting longitudinal adjustment to the master-valve, substantially as set forth. v

j l5. In a compound engine, the combinationof a series of engine cylinders, individual means for reversing the induction and eduction of the sa me, a longitudinally-slidingmaster-valve controlling the induction andeduction ducts of said reversing means and adapt- IOO IlO

IZO

ed to couple the same for duplex or serial action, a valve-chestinclosin g the master-valve,

valve and controlled bythe movement ofthe same and adapted to receive the motive fluid from a forward engine-cylinder and store the same for reuse in a rearward engine-cylinder, and means for imparting longitudinal adjustment to the master-valve, the same comprising a shaft journaled in the valve-chest and operative connections between the same and the master-valve, substantially as set forth.

16. In a compound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valvechest inclosing the master-valve, and means for adjusting the position ofthe master-valve, Substantially as set forth.

17. In a compound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a longitudinallysliding master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-valve, and means imparting longitudinal adjustment to the master-valve, substantially as set forth.

18. In a compound engine, the combination of a series of single-acting engine-cylinders,

individual valves for reversing the induction and ed uction of the same, a master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valvechest inclosing the master-Valve, and means for adj usting the position of the master-valve, substantially as set forth.

19. In a compound engine, the combination of a series of single-acting engine-cylinders, individual valves for reversing the induction and eduction of the same, a longitudinallysliding master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-valve, and means for imparting longitudinal adjustment to the mastervalve, substantially as set forth.

20. In a compound engine, the combination of a series of single-acting engine-cylinders,

individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of theI master-valve, a valve chest inclosing the master-valve, and means for imparting lateral adjustment to said valve substantially as set forth.

2l. In a compound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ductsV which are adapted to be brought into action by thelateral adjustment of the master-valve, a valve-chest inclosing the mastervalve, and means for imparting lateral adjustment to said valve, the same comprising a shaft journaled in the valve-chest and operative connections between the same and the mastervalve, substantially as set forth.

22. In a compound engine, the combination of a series of single-acting engine-cylinders,

-individual means' for reversing the induction and ed uction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the master-valve, and to couple the ind uction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting independent lateral and longitudinal movements to said valve, substantially as set forth.

23. In a compound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the master-valve, and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting independent lateral and longitudinal movements to said valve, the same comprising a shaft capable of longitudinal and rotative movements and operative connections between the same and the valve, substantially as set forth.

24. In a compound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the mastervalve, and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting independent lateral and longitudinal movements to said valve, the same comprising a shaft capable of longitudinal and rotative movements, toothed sectors carried by said shaft, toothed racks secured to the valve and meshing with said sectors and abutment-pieces on the valve IOO IIO

adapted to prevent independent longitudinal Y movement of said shaft,substantially as set forth.

25. In a compound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve.

having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are deflected laterally to meet at the middle olf' the master-valve and adapted to be alternately brought into action by the lateral adjustment of the master-valve, a valvechest inclosing the master-valve, and means for imparting lateral adjustment to said master-valve, substantially as set forth.

26. Inacompound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve .having a central longitudinal series of ducts and two series of marginal longitudinal ducts j which are deiiected laterally to meet at the middle of the master-valve and adapted to substantially as set forth.

27'. In acompound engine, the combination:v of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series 'of ducts and two series of marginal longitudinal ducts.

which are deflected laterally to meet at the middle of the master-valve and adapted to; be alternately brought into action by the lateral adjustment of the master-valve, and to` couple the inductionl and eduction ducts of the individual reversing meansfor duplex or single action by the longitudinal adjustment of the master-valve, a valve-ches'tinclosing the master-valve, and means for im-` parting independent lateral and longitudinaly movements to said valve, substantially as set forth.

2S. In acompound engine, the combination of a seriesl of single-acting engine-cylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ductsv j parting independent lateral and longitudinal l movements to said valve, the same comprising a shaft capable of longitudinal and rotative movements andoperative connections between the same and the valve, substantially as set forth.

v29. In acompound engine, the combination of a series of single-acting engine-cylinders, individual means for reversing the induction and eduction of Ythe same, a longitudinallysliding master-valve controllingtheinduction and eduction ducts of said reversing means and adapted to couple `the same for duplex or serial action, a valve-chest inclosing the master-valve, a storage-chamber controlled 'by the master-valve and adapted to receive the motive duid from a forward engine-cylinder and store the same for reuse in a rear- Ward engine-cylinder, and means for imparting longitudinal adjustment to the mastervalve, substantially as set forth.

30. Ina colnpound engine, the combination of a series of single-acting engine-cylinders, individualV means for reversing the induction and eduction of the same, a longitudinallysliding master-valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-valve, a storage-chamber formed in the master-valve and controlled by the movement of the Isame and adapted to receive the motive fluid from a forward engine-cylinder`Vv and store the same for reuse in a rearward A engine-cylinder, and means for imparting longitudinal adjustment to the master-valve the same comprising a shaft journaled in LLO the valve-chest and operative connections f between the same and the master-valve, substantially as set forth.

3l. In aconipound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and eduction of the same, a-mastervalve controlling the induction and eduction duct-s of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-valve, and means for adjusting the position of themaster-valve, substantially as set forth.

32. In a compound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the inductionand eduction of the same, a longitudinally-sliding mastervalve controlling the induction and eduction ducts of said reversing means and adapted tov couple theI same for duplex or serial actiou,a valve-chest inclosing theV mastervalve, and means imparting longitudinal adjustment to the master-valve, substantially as set forth.

33. In a compound engine, the combination of a series of single-acting oscillating enginecylinders, individual valves for reversing the induction and eduction of the same, a mastervalve controlling theinducfiou and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclcsing the master-valve, and

ilO

means for adjusting the position of the mas-1 of a series of single-acting oscillating enginecylinders, individual means for reversing the y induction and ed uction of the saine, a mastervalve having a central longitudinal series of` ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the master-valve, a valve-chest inclosing ythe master-valve, and means for impartingI lateral adjustment to 'said valve, substan `tially as set forth. 36. In acorn pound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the Ainduction and ed uction of the same, a masterducts and two series of marginal longitudinal ducts which are adapted to be alternatelyy brought into action by the lateral adjustment of the master-valve, a valve-chest inclosing the master-valve, and means for imparting lateral adjustment to said valve, the same comprising a shaft journaled in the valvechest and operative connections between the same and the master-valve, substantially as set forth.

37. -In acompoundengine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and ed uction of the same, a mastervalve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment. of the master-valve and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the mastervalve, a valve-chest inclosing the masterlvalve, and means forimparting independent lateral and longitudinal movements to said valve, substantially as set forth.

38. In a compound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and eduction of the saine, a mastervalve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action bythe lateral adjustment of the master-valve, and to couple the induction and eduction ducts of the individual reversing means for duplex or serial action by valve having a central longitudinal series of;

the longitudinal adjustment of the mastervalve, a valve-chest inclosing the mastervalve,and means for imparting independent lateral and longitudinal movements to said valve, the same comprising a shaft capable of longitudinal and rotative movements and operative connections between the same and the valve, substantially as set forth.

39. In acompound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and cduction of the same, a mastervalve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are adapted to be alternately brought into action by the lateral adjustment of the master-valve,and to couple the induction and ed uction ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the mastervalve, a valve-chest inclosing the mastervalve, and means for imparting independent lateral and longitudinal movements to said valve, the same comprising a shaft capable of longitudinal and rotative movements, toothed sectors carried by said shaft, toothed racks secured to the valve and meshing with said sectors and abutment-pieces on the valve adapted to prevent independent longitudinal movement of said shaft, substantially as set forth.

40. In a compound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and eduction of the same, a master-valve having acentral longitudinal series of ducts and two series of marginal longitudinal ducts which are dedected laterally to meet atthe middle of the master-valve and adapted to be alternately brought into action by the lateral adjustment of the mastervalve, a valve-chest inclosing the master-valve, and means for imparting lateral adjustment to said master-valve, substantially as set forth.

41. In a compound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and eduction of the same, a master-valve having a central longitudinal series of ducts and two series of marginal longitudinal ducts which are deflected laterally to meet at the middle of the master-valve and adapted to be alternately brought into action by the lateral adjustmentof the master-valve, a valve-chest inclosingnthe master-valve, and means for imparting lateral adjustment to said mastervalve,the Same comprisingashaft Ajournaled in the valve-chest and operative connections between the same and the master-valve, substantially as set forth. i

42. Inacompound engine, the combination IOC IIO

of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and eduction of the same, a master-v R valve having a central longitudinal series of ducts and two seriesof marginal longitudinal ducts whichare deflected laterally to meet at the middle of the master-valve and adapted A of a seriesof single-acting oscillating enginecylinders,` individual means for reversing the induction and ed uction of the same, a mast-ervalve having a central longitudinal series of ducts and two series of'marginal longitudinal ducts which are defiected laterally to meet at the middle of the master-valve and adapted to be alternatelyl brought into action by the lat-eral adjustment of the master-valve, and tocouple the induction and ed notion ducts of the individual reversing means for duplex or serial action by the longitudinal adjustment of the master-valve, a valve-chest in- `closing themaster-valve, and means for im-V parting independent lateral and longitudinal movements to said valve, the same comprising a shaft capable of longitudinal and rotative movements and operative connectionsv between the same and the valve, substantiallyas set forth.

44. In acompound engine, the combination of a series of single-acting oscillating enginecylinders, individual means for reversing the induction and eduction of the same, a longitudinally-sliding master valve controlling the induction and eduction ducts of said reversing means and adapted to couple the same for duplex or serial action, a valve-chest inclosing the master-valve, a storage-chamber controlled by the master-valve and adapted to receive the motive fluid from a forward engine-cylinderl and store the same for reuse in a rearward engine-cylinder, and means for imparting longitudinal adjustment to the master-valve, substantially as set forth.

45. ln acompound engine, the combination of a series of single-actin g oscillating enginecylinders, individual means for reversing the induction and eduction of the same, a longitudinally-sliding master-valve controlling the induction and'eduction ducts of said reversing means and adapted to couple the same for dnplex'or serial action, a valve-chest inclosing the mastervalve= a storage chamber formed in the master-valve and controlled by the movement of the same and adapted to receive the motive uid from a forward enginecylinder and store the same for reuse in a rearward engine-cylinder, and means for imparting longitudinal adjustment to the master-valve, the same comprising a shaft Ajournaled in the valve-chest and operative conneetions between the same and the mastervalve, substantially as set forth. Y y

46. In a single-acting oscillating engine of Il ll.

the character herein described, the combination of an engine-cylinder, an end-closure head for the same formed with a segmental face or seat and provided with a central induction-eduction duct to constitute the oscillating member of the engine-reversing valve, a non-oscillating valvemember formed with spirally-arranged induction and eduction ducts adapted to alternately register with the induction-eduction duct of the cylinder, a fluid-supply chest, means for flexibly connecting the induction-duct of the non-oscillating valve member with the fluid-supply chest of the engine, and a yielding connection holding the non-oscillating valve member to its seat against the pressure of the motive-duid supply, substantially as set forth.

47. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder, an end-closure head for the same formed with a segmental face or seat and provided with a central induction-eduction duct to constitute the oscillating member of the engine-reversing valve, a non-oscillating valve member formed with spirally-arranged induction and eduction d ucts adapted to alternately register with the induction-eduction duct of the cylinder, a

`fluid-supply chest, atluid-discharge chest,

exible connections between said induction and eduction ducts of the non-oscillating valve member and the supply and discharge chests of the engine, and means for holding the non-oscillating valve member toits seat in a yielding manner, substantially as set forth.

48. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder,an end-closure head for the same formed with a segmental face or seatand provided with a central inductioneduction duct to constitute the oscillating member of the engine-reversing valve, a nonoscillating valve member formed with spirally-arranged induction and eduction ducts adapted to alternately register with the induction-eduction duct of the cylinder, a tiuidsupply chest, a flexible bar or member attached at one end of the engine-frame and having an intermediate bearing upon the non-oscillating valve member, an adjustingbolt connected to the engine-frame and -to the other end of said bar or member and adapted to regulate the tension of the same, and means for flexibly connecting the inductionduct o-f the non-oscillating valve member with the fluid-supply chest of the engine, substantially as set forth.

49. In a single-acting oscillating engineof vrally-arranged induction and eduction ducts adapted to alternately-register with the in- IOO IIO

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f. the character herein described, the combina- I tion of an enginecylinder,an end-closure head duction-eduction duct of the cylinder, a fluidsupply chest, a fluid-discharge chest, flexible connections between said induction and eduction ducts of the non-oscillating valve mem- -ber and the supply and discharge chests of the engine, a flexible bar or member attached at one end to the engine-frame and having intermediate bearing upon the non-oscillating valve member, and an adjusting-bolt connected to the engine-frame and to the other end of said bar or member and adapted to regulate the tension of the same, substantially as set forth.

50. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder,an end-closure head for the same formed with a segmental face or seat and provided with a central inductioneduction duct to constitute the oscillating member of the engine-reversing valve, a nonoscillating valve member formed with spirally-arranged induction and eduction ducts adapted to alternately register with the induction-eduction duct-of the cylinder, a fluidsupply chest, a hollow intermediate member pivotally connected to the supply-chest of the engine and to the non-oscillating valve member to constitute a flexible conducting connecti'on between the parts, and a yielding connection holding the non oscillating Valve member to its seat, substantially as set forth.

51. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder,an end-closure head for the same formed with a segmental face or seat and provided with a central inductioneduction duct to constitute the oscillating member of the engine-reversing valve, a nonoscillating valve member formed with spirally-arranged induction and eduction ducts adapted to alternately register with the induction-eduction duct of the cylinder, a fluidsupply chest, a fluid-discharge chest, a pair of hollowintermediate members pivotally connected to the supply and discharge chests of the engine and to the non-oscillating valve member to constitute flexible conducting connections between the parts, and a yielding connection holding the non-oscillating valve member to its seat, substantially as set forth.

52. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder,au end-closure head for the same formed with a segmental face or seat and provided with a central inductioneduction duct to constitute the oscillating member of the engine-reversing valve, a nonoscillating valve member formed with spirally-arranged induction and eduction ducts adapted to alternately register with the induction-eduction duct of the cylinder, a tluidsupply chest, a fluid-discharge chest, a pair of hollowintermediate members pivotally connected to the supply and discharge chests of 'the engine, and to the non-oscillating valve member to constitute flexible conducting connections between the parts, a centrally-arranged tie-bolt connecting the intermediate members together, and a yielding connection holding the non-oscillating valve member to its seat, substantially as set forth.

53. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder,an end-closurehead for the same formed with a segmental face or Seat and provided with a central induction# eduction duct to constitute the oscillating member of the engine-reversing valve, a nonoscillating valve member formed with spirally-arranged induction and eduction ducts adapted to alternately'register with the induction-eduction duct of the cylinder, a fluidsupply chest, a fluid-discharge chest, a pair of hollowintermediate members pivotallyconnected to the supply and discharge chests of the engine and to the non-oscillating valve member to constitute iieXible conducting connections between the parts, a centrally-arranged tie-bolt connecting the intermediate members together, an elastic piece inserted between the bolt-head and one of the members, and a yielding connection holding the non-oscillatingvalve member to its seat, substantially as set forth.

54. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder, an end-closure head for the same formed witha segmental face or seat and provided with a central induction-eduction duct to constitute the oscillating member of the engine-reversing valve, a non-oscillating valve member formed with spirally arranged induction and eduction ducts adapted to alternately register with the induction eduction duct of the cylinder, a fluid supply chest, a hollow intermediate member formed with tubular necks by which it is pivotally connected to the supply-chest of the engine and to the non-oscillating valve member to constitute a flexible conducting connection between the parts, and a yielding connection holding the non-oscillating valve member to its seat; substantially as set forth.

55. In a single-acting oscillating engine of the character herein described, the combination of an engine-cylinder, an end-closure head for the same formed with a segmental face or seat and provided with a central induction-eduction duct to constitute the oscillating member of the engine-reversing valve, a non-oscillating valve member formed with spirally arranged induction and eduction ducts adapted to alternately register with the induction-eduction duct of the cylinder, a duid-supply chest, a fluid-discharge chest, a pair of hollow intermediate lmembers formed with tubular necks by which they are pivotally connected to the supply and discharge chests of the engine and to the non-oscillating valve member to constitute flexible conducting connections between the parts,and a yielding connection holding the non-oscillating valve member to its seat, substantially as set forth.

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56. In a single-acting oscillating engine of the character herein described, the combination of a vsingle-acting engine-cylinder provided wth a central induction-education duct, a valve member controlling said duct, a fluidsupply chest, a piston fitting said cylinder, and having an annular form open at one end and closed at the other end by a head, a pitman attached centrally to the closure-head of the piston, and a spider forming an intermediate connection between the pitman and the annular portion of the piston, substantially as set forth.

57. In a single-acting oscillating engine of the character herein described, the combina-- tion of a sin le-actinc` en ine-c linder ro- ,vided with a central induction-eduction duct,

CHRISTIAN c. HILL.

Witnesses:

ROBERT BURNS, HENRY A. NoTT. 

